Olympus Logo
Industrial Solutions
 
Resources
Application Notes
Back to Resources

Using the Vanta HHXRF Analyzer for Predicting FAC


Using the Vanta HHXRF Analyzer for Predicting FAC

In power generation process piping, carbon steels containing low amounts of chromium (Cr) are susceptible to accelerated corrosion. Monitoring chromium content with Vanta handheld XRF analyzers is crucial to predicting useful pipe life.

Using the Vanta HHXRF Analyzer for Predicting FAC

Carbon steel process lines can form a native protective oxide (magnetite or hematite) on the surface of the piping. At a high flow rate, this oxide coating may be removed. As the piping material attempts to regenerate the native oxide layer, the regenerated coating is also removed because of the high flow rate. This corrosion phenomenon is called flow accelerated corrosion (FAC). FAC is often made worse with turbulent flow from fittings such as elbows, tees, and reducing couplings.

Corrosion models predict carbon steels containing less than 0.04% Cr are susceptible to FAC. This monitoring threshold is within the analysis range for chromium in iron-based steels with Olympus Vanta instruments. Small increases in the amounts of Cr in carbon steel piping will significantly reduce the rate of flow accelerated corrosion. Consequently, highly accurate measurements of low levels of Cr in carbon steel are critical for predicting the end of life in these pipes.

Below are on-screen results of a Vanta analyzer (Model VMR) during Cr analysis in carbon steels. Accurate Cr readings at levels needed for FAC prediction, as shown here, are generated in less than seven seconds.

On-screen results of a Vanta analyzer

Sample being tested: IARM 229B Cr assay value: 0.017%

On-screen results of a Vanta analyzer

Sample being tested: IARM 209A Cr assay value: 0.065%

On-screen results of a Vanta analyzer

Sample being tested: IARM 28B Cr assay value: 0.13%

On-screen results of a Vanta analyzer

Sample being tested: IARM 35B Cr assay value: 1.12%

Chromium Performance in Carbon Steels

Chromium Performance in Carbon Steels

Vanta handheld XRF can quickly and accurately measure low levels of chromium in carbon steels to determine piping’s susceptibility to flow accelerated corrosion. Knowledge of chromium content allows a power generation plant to schedule piping repairs appropriately and proactively to minimize the risk of leaks or failed fittings.

Olympus IMS

ProductsUsedApplications


Vanta for PMI

Vanta handheld XRF analyzers for PMI provide highly specific material chemistry to quickly and accurately identify alloy grades to help ensure correct alloy installation in critical locations.

VantaNEW

Vanta handheld XRF analyzers are some of the toughest devices Olympus has ever made. These rugged, powerful, and intuitive instruments provide rapid, accurate element analysis and alloy identifications to customers who demand laboratory-quality results in the field.
Sorry, this page is not available in your country

Let us know what you're looking for by filling out the form below.

This site uses cookies to enhance performance, analyze traffic, and for ads measurement purposes. If you do not change your web settings, cookies will continue to be used on this website. To learn more about how we use cookies on this website, and how you can restrict our use of cookies, please review our Cookie Policy.

OK